Doubletree.



W. H. GROSSLEY.

DOUBLETREE.

Patented Aug. 11, 1914.

APPLICATION FILED APE.28, 1913.

Y) WX) N) No am. l

. WILLIAM cnossLEY,

DOUBLETREE.

License; e

Appiiatiozi ined Aprii as, i913. serial No. 764,103.

To all whom t may concern: j i n Be it known that I, VVILLiAM ILCROSS- VLnrVacit-izen of the United States, resi-v dent of` Lewiston, in the county of. Nez Perce, State of Idaho, have invented certain new and useful Improvements in Doubletrecs, of which the following is a specification.; 1 i .e The object ofmy `invention is to provide a doubletree ofa extremely strong `anddurable construction and one "in which" the strain'will be more levenly distributed than usual in devices of this kind.

A further object is to provide a doubletree of such construction that soft wood at a `comparatively low price `can be utilized for the doubletree with perfect` safety.

A further object isto provide a doubletree of such construction that a swingletree or chains can be easily and quickly attached to or detached therefrom.

My inventionl consists generally in a truss construction of doubletree iii which the pull on the clevis will y be evenly `distributed throughout theilength of the doubletree bar.

In the accompanying drawings forming part of this specification, Figure 1 is a plan View of a portion of a doubletree embodying my invention, Fig. 2 is a similar view illustrating a modified construction, Fig. 3 is an end view of the construction shown in Fig. 1.

In the drawing, 2 represents a wooden bar of suitable length for the doubletree, and provided with a centrally arranged box 3 having theusual socket 4f for a pvot pin. I have shown one end of Vthe doublet-ree and the middle portion thereof, and it will be understood that the opposite end of the bar is equipped with a clevis and truss construction similar to that shown in the drawing. I have not thought it necessary, therefore, to illustrate thefull length of the doubletree.

On the back of the bar 2 isV provided a metallic strap 5 extending along the rear edge of the bar and forming a brace or backing therefor, and at the end of the strap I provide a hook 6 having an inwardly turned end 7 which passes `through a hole in the strap 5 and into the bar 2, while the shank of the hook fits within a diagonal socket in the end of the bar andis provided with a threaded end and a lock nut 7 A clevis 8 fits over the end ofthe bar and is provided with a hook 9, the end of which is preferably flattened at 10 and has a hole therein to re- Specication of Letters Patent.

or other heavy work.

raeenteaaug. ii, `raie.

ceive the end` ofthe shank` 6. i `The endlof the` bar 2 -lias a fiattened face l1 against which the part l0 of the ,hook 9 is clamped .by the pressure of thetlock nut 7 thereon.

When ,the` `pulling strain i is applied ,toy `the hook 9 through the attachment of-.the swin` gletreewor y chain thereon, it1wi ll beitransmitted through the hook 9 tothestrap 5, and distributed lengthwise of the doubletree, said hook and strap forming` a truss- Alike construction and distributing Ythe pull on the doubletree evenly and relieving' to a very large extent the `strain which usually falls upon the clevis and the end portions of the doubletree as ordinarily constructed.`

securely bolted, i

The end of the hook 9 being will be much stronger than as "ordinarily formed. i

In Fig. 2, I have shown a modified construction which consists in providing a lag screw l2 adapted to be inserted through `the end of the hook9 into the end portion of the doubletree bar. This will have theeifect of securely holding the end of the hook and transmitting the strain thereon into the bar rather than having it entirely sustained by the clevis.

This device can be used `upon any size of evener or doubletree and with a few slight modifications in the central box can be readily adapted for swingletrees or neck-yokes This invention may also be readily adapted for the evener or doubletree of a bugg in which the swingletree is usually mounted on a coupling on the top of the evener instead of being connected `by a hook with` the eveneigvas shown in the drawings, for farin the invention to a buggy style of evener would be obvious to any one skilled in the art and I have not thought it necessary to illustrate it herein.

` I claim as my invention i l. The combination, with a bar, of a clevis This adaptation of encircling the end of said bar ,andV having 1 a hook provided with a backwardly extend! ing portion and a securing means passing through said backwardly extending portion and diagonally through the end of said bar,

and anchored therein.

i 2. The combination, with a bar, of a clevis i said bar and having* its inner end inwardly 1 turned and anchored in the rear edge of said n on? the end of said bar and provided with bar. o y

doubletree comprising a bar, a Inetallie strapextending lengthwise of said bar on' the rear ,edgevv thereof, a @levis mounted a hook, fa bolt passing throu'ghthe `end portion of said hook and through Vsaid bar and `having 'its inner end engaging"said strap and formingtherewith a truss'construction lfor `bracingand supporting said bar.

' 4; The combination, with a bar,"of a bolt passing diagonally lthrough ythe end of said bar andv having its inner` endanchored in 'the rear portion of said bar, and a clevis v'frnounted on saidl barv and having a hook end inwardly turnedfandpassing through Y said Strap and anehoredin the rea;- edggof 'In Witness 'Whereoi I havehereuntofset my' hand this 16th day of April 1912) `WILLIAM H. CROSSLEY.

Witnesses:

` -GEoRGE THrEssEN, Y

FINIS BENTLEY, n 

